Suppress LocalSend's redundant tray item (#6852)

LocalSend registers an Ayatana item with no ItemIsMenu and no Activate
handler, so its primary click is a silent no-op and the menu offers only
Open and Quit. Share > Receive already opens it, so drop the item the way
Dropbox's is dropped when its dedicated widget owns the surface.

Closes #6838

Co-authored-by: Claude Opus 5 <noreply@anthropic.com>

shell/plugins/bar/widgets/Tray.qml

@@ -159,9 +159,9 @@ BarWidget {
     return "drawer"
   }
 
-  function ownedByDedicatedWidget(item) {
+  function ownedByOmarchy(item) {
     var layout = root.bar && root.bar.layoutConfig ? root.bar.layoutConfig : null
-    return TrayModel.ownedByDedicatedWidget(item, layout)
+    return TrayModel.ownedByOmarchy(item, layout)
   }
 
   function bucket(category) {
@@ -170,7 +170,7 @@ BarWidget {
     for (var i = 0; i < values.length; i++) {
       var item = values[i]
       if (item.status === Status.Passive) continue
-      if (ownedByDedicatedWidget(item)) continue
+      if (ownedByOmarchy(item)) continue
       if (category === "all") {
         result.push(item)
         continue